However, right now, my new favorite font is Menlo that came with Snow Leopard. It's another variant of Bitstream Vera and it seems to work much better at smaller font sizes. Which is great for limited screen sizes (such as 1280x800 on a smaller laptop).
Wow, I hadn't noticed Menlo, thanks. I've been using Bitstream Vera Sans Mono for a while but I don't like how faint the hyphen is with anti-aliasing when I'm coding in haml – a problem that Menlo fixes.